CN109646983A - A kind of protective device and method of Uranium enrichment plant's material container disassembling operations - Google Patents
A kind of protective device and method of Uranium enrichment plant's material container disassembling operations Download PDFInfo
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- CN109646983A CN109646983A CN201811495496.9A CN201811495496A CN109646983A CN 109646983 A CN109646983 A CN 109646983A CN 201811495496 A CN201811495496 A CN 201811495496A CN 109646983 A CN109646983 A CN 109646983A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/02—Treating gases
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Abstract
The present invention relates to uranium enriching plants for feeding technical field, specifically discloses the protective device and method of a kind of Uranium enrichment plant's material container disassembling operations, can carry out evacuation purging to container connecting tube when material container dismounting in for feeding workshop.Using protective device of the present invention, in entire disassembly process, the pernicious gas remained in container connecting tube will not be spilt into workshop, but by the device condensation of congealing of the device, and purification is further trapped through adsorption tower and filter, considerably reduce the radioactive pollution of workshop.
Description
Technical field
The invention belongs to uranium enriching plants for feeding technical field, and in particular to a kind of Uranium enrichment plant's material container dismounting behaviour
The protective device and method of work.
Background technique
In previous uranium enrichment engineering, the safeguard procedures taken for feeding workshop material container disassembling operations as shown in Figure 1,
After feed and feeding, material container needs to disconnect with system, dismounts container connecting tube by manual operation.Due to holding when dismounting
Device can be communicated directly with power house environment with the metal hose for connecting between reclaimer system, and remaining uranium-bearing is fluorine-containing in connecting tube has
Evil gas can be spilt into workshop from container connecting tube, in order to avoid diffusion of the radioactive substance in workshop, be connected in container
Local exhaust mouth is nearby arranged in pipe dismounting point, and container connecting tube spills into the fluorine-containing pernicious gas of uranium-bearing of workshop, passes through when dismounting
Suspended hood enters local exhaust system, plays the role of radioactivity protection.Into local exhaust system pernicious gas through two-stage
Purified treatment heel row up to standard is to atmosphere.
The diffusion of radioactive substance, engineering when although above-mentioned safeguard procedures can reduce disassembling operations to a certain extent
When the actual use situation at scene shows to dismount container, still has a small amount of pernicious gas meeting loss and enter workshop, unavoidably
Ground can cause radioactive material to pollute in workshop, cause damages to the health of operator.
Above-mentioned traditional measure that disassembling operations protection is carried out using local exhaust system, existing main problem are as follows:
(1) container connecting tube is in barotropic state after broken sky, and remaining radgas diffuses into workshop first, so
It is pumped in innings air-exhausting duct again afterwards, in this course, a possibility that worker's sucking or contamination radioactive substance is very big, and safety is anti-
It is poor to protect effect.
It (2) is guarantee air draught effect, it is ensured that wind speed is not less than 1m/s at cover mouth, simultaneously because for feeding container in workshop
It counts numerous, hood mouth quantity is more, and the air leakage coefficient of local exhaust system is big, and the load of office's exhaust blower is very big, blower
Power is big, and operating cost is high.
(3) it closely will affect container disengaging condensation evaporation device excessively from container connecting tube due to the position of suspended hood, too far then
Extraction effect is poor, so suspended hood and office's row's branch pipe are packaged type.When carrying out container dismounting, need to carry suspended hood
To removal position, and container disassembling operations are comparatively frequent, so certain manpower waste is caused, it is inconvenient.
Summary of the invention
The purpose of the present invention is to provide the protective devices and method of a kind of Uranium enrichment plant's material container disassembling operations, avoid
In material container disassembling operations, pernicious gas is to workshop loss.
Technical scheme is as follows:
A kind of protective device of Uranium enrichment plant's material container disassembling operations, for the material container dismounting in for feeding workshop
When evacuation purging is carried out to container connecting tube；Protective device includes congeal device, small-sized deep cooling box, adsorption tower, filter, injection
Pump evacuates and uses vacuum pump set；
The material container is set in container condensation evaporation device；
The container connecting tube has two, wherein one by material container successively with the device that congeals, adsorption tower and filter string
Even, then in parallel with jet pump and evacuation vacuum pump set respectively；
Two container connecting tubes can realize interconnection by bridging pipeline；
The device that congeals is for condensing the trace harmful gases evacuated in air-flow；
It is equipped with small-sized deep cooling box in the outside of the device that congeals, the device that congeals can be freezed；
The adsorption tower evacuates the still uncooled trace harmful gases of device of congealing in air-flow for further adsorbing；
The filter is used to filter the trace solid micronic dust impurity evacuated in air-flow；
The jet pump can maintain container connecting tube to be in negative pressure state always, make to remain in container connecting tube
Pernicious gas will not be spilt into workshop；
The evacuation is composed in series by the vacuum pump of pumping atmosphere with lobe pump with vacuum pump set, and it is big to vacuumize depth, is used
It is replaced in being evacuated to the residual materials in container connecting tube；
The purging air valve door is set in one section of container connecting tube between material container and the device that congeals；Described
Atmosphere is led in purging air valve door one end, realizes that air enters pipeline by the opening and closing of purging air valve door, to realize
Air-flow replaces purpose.
The jet pump can be using the vacuum pump substitution for directly taking out atmosphere.
The jet pump can be substituted using claw dry pump or vortex pump.
The purging is high vacuum pressure resistance angle valve with air valve door.
The small-sized deep cooling box device that can will congeal is refrigerated to -170 DEG C.
A kind of means of defence of Uranium enrichment plant's material container disassembling operations using the protective device, including following step
It is rapid:
1) connecting pipeline
After material container completes feed or rewinding, material container and the connection for reclaiming technology system are disconnected, and close
The valve of material container；
It by material container and is congealed device, adsorption tower, filter, jet pump and evacuation vacuum machine by container connecting tube
Group is connected；
2) purging is evacuated
Start evacuation vacuum pump set, container connecting tube is evacuated, makes the material in container connecting tube through the device that congeals
Condensing trapping, then by being discharged into local exhaust system through process tail gas pipeline after adsorption tower and the further purified treatment of filter；
It then proceedes to evacuate container connecting tube, be evacuated again after being inflated by purging with air valve door, replace repeatedly,
Purging；After evacuating the gas purged by the device that congeals, adsorption tower and filter cleaning, into local exhaust system, directly
U, HF content meet the requirement of control standard in gas in container connecting tube, close evacuation vacuum pump set, complete to evacuate and blow
It washes；
3) material container is dismounted
Before carrying out material container dismounting, jet pump is opened, so that remaining negative pressure shape at container connecting tube dismounting mouth
State, guarantee container connection pipe band trace harmful gases will not loss to workshop, but enter in purification device pipeline, through solidifying
After freezing device condensing trapping, then by adsorption tower and the further purified treatment of filter, local exhaust is discharged into through process tail gas pipeline
System；
Finally material container and container connecting tube are separated.
Step 3), ensure to congeal device, adsorption tower, filter and spray during material container and container connecting tube are separated
The connecting line for penetrating pump is unimpeded, jet pump normal operation.
When needing to dismount there are two material container simultaneously, can be dismounted respectively by two-way protective device in parallel.
Remarkable result of the invention is:
(1) protective device of the present invention is used, in entire disassembly process, remains in pernicious gas in container connecting tube not
It can spill into workshop, but by the device condensation of congealing of the device, and purification is further trapped through adsorption tower and filter, substantially
Degree reduces the radioactive pollution of workshop.
(2) protective device of the present invention uses consume energy lower jet pump and evacuation vacuum pump group, alleviates back-office
The workload of blower in portion's exhaust system, local exhaust blower model reduce, and can reduce construction investment and save operating cost.
(3) protective device of the present invention and method are used when carrying out material container dismounting, it is only necessary to artificial in disassembly process
Jet pump and the start-stop for using vacuum pump set is evacuated in control device, facilitates fast, abolished original carrying air draught completely
The process of cover reduces manpower waste.
(4) protective device of the present invention can also be used in the maintenance of other radioactivity process equipments.
Detailed description of the invention
Fig. 1 is original for feeding workshop material container disassembling operations safeguard procedures schematic diagram；
Fig. 2 is the present invention for feeding workshop material container disassembling operations protective device schematic diagram；
Fig. 3 is protective device of embodiment of the present invention schematic diagram.
In figure: 1 material container；1-1 material container A；1-2 material container B；2 container connecting tubes；2-1 container connecting tube A；
2-2 container connecting tube B；3 suspended hoods；4 container condensation evaporation devices；4-1 container condensation evaporation device A；4-2 container condensation evaporation
Device B；5 congeal device；5-1 congeals device A；5-2 congeals device B；6 small-sized deep cooling boxes；The small-sized deep cooling box A of 6-1；The small-sized deep cooling box of 6-2
B；7 adsorption towers；7-1 adsorption tower A；7-2 adsorption tower B；8 filters；8-1 filter A；8-2 filter B；9 jet pumps；9-1 injection
Pump A；9-2 jet pump B；Vacuum pump set is used in 10 evacuations；10-1, which is evacuated, uses vacuum pump set A；10-2, which is evacuated, uses vacuum pump set B；11 blow
It washes with air valve door；11-1 purging air valve door A；11-2 purging air valve door B.
Specific embodiment
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.
As shown in Fig. 2, a kind of protective device of Uranium enrichment plant's material container disassembling operations, for the object in for feeding workshop
Evacuation purging is carried out to container connecting tube 2 when material container 1 dismounts, protective device includes congeal device 5, small-sized deep cooling box 6, adsorption tower
7, filter 8, jet pump 9, evacuation vacuum pump set 10.
The material container 1 is UF6Container is set in container condensation evaporation device 4.
The container connecting tube 2 has two, wherein one by material container 1 successively with the device 5 that congeals, adsorption tower 7 and filtering
Device 8 is contacted, then in parallel with vacuum pump set 10 with jet pump 9 and evacuation respectively.Two container connecting tubes 2 can by across
Adapter tube line realizes interconnection.
The capacity of the device 5 that congeals is 24L, for condensing the micro UF evacuated in air-flow6And HF gas.It congeals described
The outside of device 5 is equipped with small-sized deep cooling box 6, and the device 5 that can will congeal is refrigerated to -170 DEG C.
The adsorption tower 7 evacuates the still uncooled micro HF gas of device 5 that congeals in air-flow for further adsorbing.
The filter 8 is used to filter the trace solid micronic dust impurity evacuated in air-flow.
The jet pump 9 can maintain container connecting tube 2 to be in negative pressure state always, make to remain in container connecting tube 2
In pernicious gas will not spill into workshop.The jet pump 9 can be using the vacuum pump substitution for directly taking out atmosphere, such as pawl
Formula dry pump, vortex pump etc..
The evacuation is composed in series by the vacuum pump of pumping atmosphere with lobe pump with vacuum pump set 10, and it is big to vacuumize depth,
For evacuating displacement to the residual materials in container connecting tube 2.
The purging air valve door 11 be high vacuum pressure resistance angle valve, one between material container 1 and the device 5 that congeals
In section container connecting tube 2.Atmosphere is led in described 11 one end of purging air valve door, passes through the purging opening and closing of air valve door 11
Realize that air enters pipeline, to realize that air-flow replaces purpose.
A kind of means of defence of Uranium enrichment plant's material container disassembling operations, is operated using above-mentioned protective device, including
Following steps:
(1) connecting pipeline
After material container 1 completes feed or rewinding, material container 1 and the connection for reclaiming technology system are disconnected, and close
Close the valve of material container 1；
Material container 1 and the device 5 that congeals, adsorption tower 7, filter 8, jet pump 9 and evacuation are used by container connecting tube 2
Vacuum pump set 10 is connected；
(2) purging is evacuated
Start evacuation vacuum pump set 10, container connecting tube 2 is evacuated, makes the material in container connecting tube 2 through solidifying
Freeze 5 condensing trapping of device, then by being discharged into local row through process tail gas pipeline after adsorption tower 7 and the further purified treatment of filter 8
Wind system；
It then proceedes to evacuate container connecting tube 2, evacuates after being inflated by purging with air valve door 11, set repeatedly again
It changes, purge；After gas by evacuating purging is purified by the device 5 that congeals, adsorption tower 7 and filter 8, into local exhaust system
System closes evacuation vacuum pump set 10 until U, HF content meet the requirement of control standard in gas in container connecting tube 2, complete
It is purged at evacuating；
(3) material container is dismounted
Before carrying out material container 1 and dismounting, jet pump 9 is opened, so that container connecting tube 2, which dismounts, remains negative pressure at mouth
State guarantees the micro UF that container connecting tube 2 is carried secretly6And the pernicious gases such as HF will not loss to workshop, but enter purification dress
It sets in pipeline, after 5 condensing trapping of device that congealed, then by adsorption tower 7 and the further purified treatment of filter 8, through process tail gas
Pipeline is discharged into local exhaust system；
Finally material container 1 and container connecting tube 2 are separated, while the device 5 that ensures to congeal, adsorption tower 7, filter 8 and spray
The connecting line for penetrating pump 9 is unimpeded, 9 normal operation of jet pump.
Embodiment
As shown in figure 3, a kind of protective device of Uranium enrichment plant's material container disassembling operations, for the object in for feeding workshop
When material container A1-1 and material container B1-2 is dismounted, respectively container connecting tube A2-1 and container connecting tube B2-2 evacuate and be blown
It washes.For being dismounted to material container A1-1, protective device A include purging cut valve A11-1, the device A5-1 that congeals,
Small-sized deep cooling box A6-1, it adsorption tower A7-1, filter A8-1, jet pump A9-1, evacuates and uses vacuum pump set A10-1.
The container connecting tube A2-1 successively with purging air valve door A11-1, congeal device A5-1, adsorption tower A7-1 and
Filter A8-1 series winding, it is then in parallel with vacuum pump set A10-1 with jet pump A9-1 and evacuation respectively.
In material container B1-2 dismounting, protective device B is identical as the connection of protective device A, the two parallel arrangement.Engineering
In, protective device A and protective device B it is a set of operation, it is a set of spare, can also two sets run simultaneously.
A kind of means of defence of Uranium enrichment plant's material container disassembling operations, is operated using above-mentioned protective device, including
Following steps:
(1) connecting pipeline
After material container A1-1 completes feed or rewinding, material container A1-1 and the company for reclaiming technology system are disconnected
It connects, and closes the valve of material container A1-1；
By container connecting tube A2-1 by material container A1-1 and congeal device A5-1, adsorption tower A7-1, filter A8-1, spray
Pump A9-1 and evacuation vacuum pump set A10-1 is penetrated to be connected；
(2) purging is evacuated
Start evacuation vacuum pump set A10-1, container connecting tube A2-1 is evacuated, is made in container connecting tube A2-1
Material is congealed device A5-1 condensing trapping, then by adsorption tower A7-1 and the further purified treatment of filter A8-1 after, through technique
Exhaust pipe is discharged into local exhaust system；
It then proceedes to evacuate container connecting tube A2-1, be evacuated again after being inflated by purging with air valve door A11-1,
It replaces, purge repeatedly；Gas by evacuating purging is purified by the device A5-1 that congeals, adsorption tower A7-1 and filter A8-1
Afterwards, into local exhaust system, until being closed when U, HF content meet the requirement of control standard in gas in container connecting tube A2-1
Evacuation vacuum pump set A10-1 is closed, completes to evacuate purging；
(3) material container is dismounted
Before carrying out container connecting tube A2-1 dismounting, jet pump A9-1 is opened, eats dishes without rice or wine to locate so that container connecting tube A2-1 is broken
It remains negative pressure state, guarantees the micro UF carried secretly at container connecting tube A2-1 dismounting mouth6And the pernicious gases such as HF will not escape
It is dissipated to workshop, but is entered in purification device pipeline, after the device A5-1 condensing trapping that congealed, then passes through adsorption tower A7-1 and filtering
The further purified treatment of device A8-1 is discharged into local exhaust system through process tail gas pipeline；
Finally material container A1-1 and container connecting tube A2-1 are separated, while the device A5-1 that ensures to congeal, small-sized deep cooling box
A6-1, adsorption tower A7-1, the connecting line of filter A8-1 and jet pump A9-1 are unimpeded, jet pump A9-1 normal operation.
After material container B2-1 completes feed or rewinding, means of defence and the material container A1-1 phase of disassembling operations
Together.
Claims (8)
1. a kind of protective device of Uranium enrichment plant's material container disassembling operations, it is characterised in that: for the object in for feeding workshop
Material container (1) carries out evacuation purging to container connecting tube (2) when dismounting；Protective device includes congeal device (5), small-sized deep cooling box
(6), vacuum pump set (10) are used in adsorption tower (7), filter (8), jet pump (9), evacuation；
The material container (1) is set in container condensation evaporation device (4)；
The container connecting tube (2) has two, wherein one by material container (1) successively with the device that congeals (5), adsorption tower (7) and
Filter (8) series winding, it is then in parallel with vacuum pump set (10) with jet pump (9) and evacuation respectively；
Two container connecting tubes (2) can realize interconnection by bridging pipeline；
The device that congeals (5) is used to condense the trace harmful gases evacuated in air-flow；
Small-sized deep cooling box (6) are equipped in the outside of the device that congeals (5), the device that congeals (5) can be freezed；
The adsorption tower (7) evacuates the still uncooled trace harmful gases of device (5) of congealing in air-flow for further adsorbing；
The filter (8) is used to filter the trace solid micronic dust impurity evacuated in air-flow；
The jet pump (9) can maintain container connecting tube (2) to be in negative pressure state always, make to remain in container connecting tube
(2) pernicious gas in will not be spilt into workshop；
The evacuation is composed in series by the vacuum pump of pumping atmosphere with lobe pump with vacuum pump set (10), and it is big to vacuumize depth, is used
It is replaced in being evacuated to the residual materials in container connecting tube (2)；
The purging air valve door (11) is set to one section of container connecting tube (2) between material container (1) and the device that congeals (5)
On；Atmosphere is led in described purging air valve door (11) one end, realizes air by the opening and closing of purging air valve door (11)
Into pipeline, to realize that air-flow replaces purpose.
2. a kind of protective device of Uranium enrichment plant's material container disassembling operations as described in claim 1, it is characterised in that: described
Jet pump (9) can using directly take out atmosphere vacuum pump substitute.
3. a kind of protective device of Uranium enrichment plant's material container disassembling operations as claimed in claim 2, it is characterised in that: described
Jet pump (9) can be substituted using claw dry pump or vortex pump.
4. a kind of protective device of Uranium enrichment plant's material container disassembling operations as claimed in claim 3, it is characterised in that: described
Purging air valve door (11) be high vacuum pressure resistance angle valve.
5. a kind of protective device of Uranium enrichment plant's material container disassembling operations as claimed in claim 4, it is characterised in that: described
Small-sized deep cooling box (6) device (5) that can will congeal be refrigerated to -170 DEG C.
6. a kind of means of defence of Uranium enrichment plant's material container disassembling operations using protective device described in claim 5, special
Sign is: the following steps are included:
1) connecting pipeline
After material container (1) completes feed or rewinding, material container (1) and the connection for reclaiming technology system are disconnected, and close
Close the valve of material container (1)；
By container connecting tube (2) by material container (1) and congeal device (5), adsorption tower (7), filter (8), jet pump (9) with
And it evacuates and is connected with vacuum pump set (10)；
2) purging is evacuated
Start evacuation with vacuum pump set (10), container connecting tube (2) is evacuated, the material in container connecting tube (2) is passed through
Congeal device (5) condensing trapping, then by the further purified treatment of adsorption tower (7) and filter (8) after, arranged through process tail gas pipeline
Enter local exhaust system；
It then proceedes to evacuate container connecting tube (2), evacuates after being inflated by purging with air valve door (11), set repeatedly again
It changes, purge；After gas by evacuating purging is purified by the device that congeals (5), adsorption tower (7) and filter (8), into part
Exhaust system closes evacuation vacuum machine until U, HF content meet the requirement of control standard in container connecting tube (2) interior gas
Group (10) is completed to evacuate purging；
3) material container is dismounted
It before carrying out material container (1) dismounting, opens jet pump (9), so that remaining negative at container connecting tube (2) dismounting mouth
Pressure condition, guarantee container connecting tube (2) entrainment trace harmful gases will not loss to workshop, but enter purification device pipeline
It is interior, after the device that congealed (5) condensing trapping, then by adsorption tower (7) and filter (8) further purified treatment, through process tail gas
Pipeline is discharged into local exhaust system；
Finally material container (1) and container connecting tube (2) are separated.
7. a kind of means of defence of Uranium enrichment plant's material container disassembling operations as claimed in claim 6, it is characterised in that: step
3), ensure to congeal device (5), adsorption tower (7), filter (8) during material container (1) and container connecting tube (2) is separated
It is unimpeded with the connecting line of jet pump (9), jet pump (9) normal operation.
8. a kind of means of defence of Uranium enrichment plant's material container disassembling operations as claimed in claim 7, it is characterised in that: when same
When needing to dismount there are two material container (1), can be dismounted respectively by two-way protective device in parallel.
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| CN201811495496.9A CN109646983A (en) | 2018-12-07 | 2018-12-07 | A kind of protective device and method of Uranium enrichment plant's material container disassembling operations |
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| CN110453199A (en) * | 2019-09-11 | 2019-11-15 | 光驰科技(上海)有限公司 | A kind of filter device of atomic layer deposition apparatus technique residual gas |
| CN112414768A (en) * | 2019-08-20 | 2021-02-26 | 中核陕西铀浓缩有限公司 | Subsampling method of uranium concentration plant |
| CN114307643A (en) * | 2021-12-17 | 2022-04-12 | 四川红华实业有限公司 | Feeding device for processing bromine trifluoride of unit |
| CN114377612A (en) * | 2021-12-31 | 2022-04-22 | 四川红华实业有限公司 | Automatic control method for product purification process |
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Application publication date: 20190419 |